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Investigation on leaching of malachite by citr.c acid

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Inter.ational Jour.al of Miner.ls,Metallur.y and Mater.als 2012年第9期19卷 782-786页

作者： M.A. shabani M. Ir.nnajad A.r. Azadmehr Depar.ment of Mining & Metallur.ical Engineer.ng Amirkabir University of Technology P.O. Box 15875-4413 Tehran *** Iran

Leaching of an oxidized copper.or. containing malachite, as a new appr.ach, was investigated by an or.anic r.agent, citr.c acid. Sulfur.c acid is the most common r.agent in the leaching of oxide copper.or.s, but it has sever.l side effects such as sever. adver.e impact on the envir.nment. In this investigation, the effects of par.icle size, acid concentr.tion, leaching time, solid/liquid r.tio, temper.tur., and stir.ing speed wer. optimized. Accor.ing to the exper.mental r.sults, malachite leaching by citr.c acid was technically feasible. Optimum leaching conditions wer. found as follows： the r.nge of par.icle size, 105-150 μm; acid concentr.tion, 0.2 M; leaching time, 30 min; solid/liquid r.tio, 1：20 g/mL; temper.tur., 40℃; and stir.ing speed, 200 r.min. Under.the optimum conditions, 91.61% of copper.was extr.cted.

关键词： malachite copper.or. tr.atment leaching or.anic acids citr.c acid

Application of the Extr.sion to Incr.ase the Binding between the Cer.mic Par.icles and the Metal Matr.x:Enhancement of Mechanical and Tr.bological Pr.per.ies

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Jour.al of Mater.als Science & Technology 2013年第5期29卷 423-428页

作者： Ali Mazaher. Mohsen Ostad shabani Depar.ment of Mater.als Science Lenjan BranchIslamic Azad UniversityIsfahanIran

Aluminum alloyed with magnesium and silicon has been used as the matr.x mater.al owing to its excellent mechanical pr.per.ies coupled with good for.ability and its wide applications in industr.al sector. An extr.sion pr.cess was developed to consolidate AI 6061-SiCp composites fr.m mixed powder.. The r.sults show that the composites wer. fully densified, with no sign of por.s or.oxide layer. obser.able in the optical micr.scope. The SiC par.icles wer. distr.buted unifor.ly in the matr.x. As compar.d with 6061 alloys, the composites demonstr.ted a smaller.elongation, but exhibited a higher.Young＇s modulus and a lar.er.wor. har.ening capacity. These composites possessed much higher.elongation at the same str.ngth level. The pr.sent study also addr.ssed the dr. wear.behavior.of the composites at differ.nt sliding speeds and applied loads. Values of the fr.ction coefficient of the matr.x alloy and composite mater.als wer. in expected r.nge for.light metals in dr. sliding conditions. All of these impr.vements wer. attr.buted to the mer.ts, including full densification of the bulk, unifor. disper.ion of the SiC par.icles in the matr.x, and str.ng binding between the SiC par.icles and the matr.x r.sulting fr.m the extr.sion.

关键词： Aluminum Str.ngth Wear Extr.sion Metal matr.x composites

Assessment of gr.undwater.potential using multi-cr.ter.a decision analysis and geoelectr.cal sur.eying

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Geo-Spatial Infor.ation Science 2022年第4期25卷 600-618页

作者： Mar.ieh shabani Zohr.h Masoumi Abolfazl r.zaei Depar.ment of Ear.h Sciences Institute for Advanced Studies in Basic Sciences(IASBS)ZanjanIran Center.for.r.sear.h in Climate Change and Global War.ing(Cr.C) Institute for Advanced Studies in Basic Sciences(IASBS)ZanjanIran

A pr.cise map of the disper.ion of the gr.undwater.potential acr.ss each water.hed can help decision-maker. to exer. optimal water.management in each *** this r.sear.h,the potential of gr.undwater.r.sour.es in both the Zanjanr.od Catchment and the Tar.m r.gion,located in the nor.hwest of Ir.n,has been *** effective cr.ter.a including slope,land-use,dr.inage density,spr.ng density,lithology,lineament density,and r.infall ar. *** wer. fir.t weighted using the Analytical Hier.r.hical Pr.cess(AHP)method and then over.aid by the Technique for.Or.er.Pr.fer.nces by Similar.ty to Ideal(TOPSIS)***,the spatial zoning map of gr.undwater.potential was obtained in four.categor.es.A sensitivity analysis was per.or.ed to deter.ine the influence of each cr.ter.on on the obtained *** model was ver.fied using both the spatial distr.bution of the high-dischar.ed pr.duction wells and the geophysical-based geoelectr.c field *** r.sults indicate that the high-dischar.ed wells(>40 l/s)in both r.gions ar. disper.ed pr.dominantly in the ver. good zone and,in sever.l cases,in the good ***,the r.sults fr.m the two-dimensional models of r.sistivity and induced polar.zation of geoelectr.cal field sur.ey ar. inappr.pr.ate agr.ement with those fr.m the TOPSIS ***,ther. is no suitable potential zone of gr.undwater.in the sur.ounding highlands to be used in the futur. for.dr.nking pur.oses since the highlands water.supply is a str.tegic supply for.*** str.tegies employed in this study,the r.sults of GIS modeling,and the geoelectr.cal analysis can be consider.d for.sustainable development of similar.ar.d and semi-ar.d ar.as since gr.undwater.is consider.d as the main supplier.of water.in such r.gions.

关键词： Spatial Infor.ation System(GIS) r.mote Sensing(r.) gr.undwater.potential TOPSIS geoelectr.cal field sur.ey sustainable development

Semicomplete Finite p-Gr.ups of Class 2

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Algebr. Colloquium 2016年第4期23卷 651-656页

作者： M. shabani Attar Depar.ment of Mathematics Payame Noor University P.O. Box 19395-4697 Tehran Iran

Let G be a gr.up and G＇ be its commutator.subgr.up. An automor.hism α of a gr.up G is called an IA-automor.hism if x^-1α（x） ∈G＇ for.each x∈G. The set of all IA-automor.hisms of G is denoted by IA（G）. A gr.up G is called semicomplete if and only if IA（G） = Inn（G）, wher. Inn（G） is the inner.automor.hism gr.up of G. In this paper.we completely char.cter.ze semicomplete finite p-gr.ups of class 2; we also classify all semicomplete finite p-gr.ups of or.er.p^n （n≤5）, wher. p is an odd pr.me. This completes our.wor. in 2011.

关键词： semicomplete gr.ups IA-automor.hisms finite p-gr.ups

Per.or.ance-based seismic assessment of a histor.cal masonr. ar.h br.dge:Effect of pulse-like excitations

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Fr.ntier. of Str.ctur.l and Civil Engineer.ng 2023年第6期17卷 855-869页

作者： Amir.osein shabani Mahdi KIOUMAr.I Vagelis PLEVr.S Depar.ment of Built Envir.nment Oslo Metropolitan UniversityOslo 0166Norway Depar.ment of Civil and Ar.hitectur.l Engineer.ng Qatar UniversityDoha 2713Qatar

Seismic analysis of histor.cal masonr. br.dges is impor.ant for.author.ties in all countr.es hosting such cultur.l her.tage *** masonr. ar.h br.dge investigated in this study was built dur.ng the r.man per.od and is on the island of r.odes,in *** seismic r.cor.s wer. consider.d and categor.zed as far.field,pulse-like near.ield,and non-pulse-like *** ear.hquake excitations wer. scaled to a tar.et spectr.m,and nonlinear.timehistor. analyses wer. per.or.ed in the tr.nsver.e *** per.or.ance levels wer. intr.duced based on the pushover.cur.e,and the post-ear.hquake damage state of the br.dge was *** to the r.sults,pulse-like near.field events ar. mor. damaging than non-pulse-like near.field gr.und *** the br.dge is mor. vulner.ble to far.field excitations than near.field ***,the str.ctur. will suffer.extensive post-ear.hquake damage and must be r.tr.fitted.

关键词： masonr. ar.h br.dges seismic behavior modal pr.per.ies pulse-like r.cor.s nonlinear.time histor. analysis

STABILITY ANALYSIS OF A CAPACITIVE FGM MICr.-BEAM USING MODIFIED COUPLE STr.SS THEOr.

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Acta Mechanica Solida Sinica 2013年第4期26卷 427-440页

作者： Behr.kh Abbasnejad Ghader.r.zazadeh r.sool shabani Mechanical Engineer.ng Depar.ment Urmia University

Based on the Modified Couple Str.ss Theor.,a functionally gr.ded micr.-beam under.electr.static for.es is *** FGM micr.-beam is made of two mater.als and mater.al pr.per.ies var. continuously along the beam thickness accor.ing to a *** and static pull-in voltages ar. obtained and it is shown that the static and dynamic pull-in voltages for.some mater.als cannot be obtained using classic theor.es and components of couple str.ss must be taken into *** addition,it is shown that the values of pull-in voltages depend on the var.ation thr.ugh the thickness of the volume fr.ctions of the two constituents.

关键词： MEMS FGM micr.-beam stability pull-in voltage electr.static pr.ssur. modified couple str.ss theor.

Bioleaching of copper.oxide or. by P seudomonas aer.ginosa

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Inter.ational Jour.al of Miner.ls,Metallur.y and Mater.als 2013年第12期20卷 1130-1133页

作者： M.A.shabani M.Ir.nnajad A.r.Azadmehr.M.Meshkini Depar.ment of Mining & Metallur.ical Engineer.ng Amirkabir University of Technology Ir.nian Academic Center.for.Education Culture and Research (ACECR)Branch of Amirkabir

Bioleaching is an envir.nmentally fr.endly method for.extr.ction of metal fr.m or.s. In this study, bioleaching of copper.oxide or. by Pseudomonas aer.ginosa was investigated. Pseudomonas aer.ginosa is a heter.tr.phic bacter.m that can pr.duce var.ous or.anic acids in an appr.pr.ate cultur. medium, and these acids can oper.te as leaching agents. The par.meter., such as par.icle size, glucose per.entage in the cultur. medium, bioleaching time, and solid/liquid r.tio wer. optimized. Optimum bioleaching conditions wer. found as follows： par.icle size of 150-177 μm, glucose per.entage of 6%, bioleaching time of 8 d, and solid/liquid r.tio of 1：80. Under.these conditions, 53% of copper.was extr.cted.

关键词： copper.or. tr.atment copper.oxides bioleaching or.anic acids heter.tr.phic bacter.a Pseudomonas aer.ginosa

Active Contr.l of A Piston-Type Absor.ing Wavemaker.with Fully r.flective Str.ctur.

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China Ocean Engineer.ng 2020年第5期34卷 730-737页

作者： Saeed MAHJOUr. r.soul shabani Ghader.r.ZAZADEH Peyman BADIEI Depar.ment of Mechanical Engineer.ng Faculty of EngineeringUrmia UniversityUrmiaIran South Ur.l state Univer.ity ChelyabinskRussian Federation cDepar.ment of Civil Engineer.ng Tehran UniversityTehranIran

Multiple r.flections of the waves between str.ctur. and wavemaker.in hydr.ulic flumes could change the fr.quency content of the desir.d incident wave or.r.sult in r.sonance. A pr.minent appr.ach to avoid multiple r.flections is active contr.l of the wavemaker. This paper.pr.poses a simple and pr.ctical active contr.l algor.thm for.piston-type wavemaker. The block diagr.m of the contr.l system is pr.sented in r.al time domain. It is shown that ther. is no need to use any tr.nsfer.function or.filter.in the feedback and feed for.ar. loops and the use of constant gains can yield acceptable r.sults. In the oper.ting fr.quency r.nge(0.25-2 Hz), it is r.vealed that the pr.posed system is ver. effective at suppr.ssing the excitation of r.sonant sloshing for.r.gular.wave. In the case of ir.egular.waves, it is depicted that the exper.mental waves agr.e quite well with the desir.d wave elevation in fr.quency domain. In addition, compar.son of the r.sults obtained both with and without absor.tion discloses the good char.cter.stics in time domain.

关键词： wave flume piston-type wavemaker active absor.tion mathematical modeling r.flective waves

Effects of inter.ediate Ni layer.on mechanical pr.per.ies of Al–Cu layer.d composites fabr.cated thr.ugh cold r.ll bonding

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Inter.ational Jour.al of Miner.ls,Metallur.y and Mater.als 2018年第5期25卷 573-583页

作者： Ali shabani Mohammad r.za Tor.ghinejad Alir.za Bagher. Depar.ment of Mater.als Engineer.ng Isfahan University of Technology

Layer.d composites have attr.cted consider.ble inter.st in the r.cent liter.tur. on metal composites. Their.mechanical pr.per.ies depend on the quality of the bonding pr.vided by the inter.ediate layer.. In this study, we analyzed the mechanical pr.per.ies and bond str.ngths pr.vided by the nickel layer.with r.spect to its thickness and natur.(either.powder.or.coating). The r.sults suggest that bond str.ngth decr.ases with an incr.ase in the content of nickel powder. At 0.3 vol% of nickel coating, we found the natur. of nickel to be less efficient in ter.s of bond str.ngth. A differ.nt pictur. ar.se when the content of nickel was incr.ased and the bond str.ngth incr.ased in nickel coated samples. In addition, the r.sults demonstr.te that mechanical pr.per.ies such as bend str.ngth ar. str.ngly dependent on bond str.ngth.

关键词： cold r.ll bonding Al/Ni/Cu composite mechanical testing metallogr.phy